Sitona lineata
Pest description and crop damage Adults are small, grayish brown, faintly striped weevils about 0.17 inch long. They appear in large numbers in spring and sometimes late summer. Adult feeding on young plants in spring may considerably notch and rag leaves, but this damage has not been found to reduce stand or yield appreciably.
Management-chemical control
- alpha-cypermethrin (Fastac EC) at 0.017 to 0.025 lb ai/A. PHI 21 days. REI 4 hr. Retreatment interval 5 days. Do not exceed 0.075 lb ai/A per year.
- carbaryl (Carbaryl 4L) at 1.5 lb ai/A. PHI 14 days for grazing or harvest for forage, 21 days for harvest. Do not exceed 6 lb ai/A per season. Retreatment interval 7 days. REI 12 hr.
- cyfluthrin (Tombstone Helios) at 0.038 to 0.050 lb ai/A. PHI 7 days. REI 12 hr. Retreatment interval 14 days. Do not exceed 0.1 lb ai/A per year.
- phosmet (Imidan 70W) at 0.7 to 1 lb ai/A. PHI 7 to 10 days. REI 5 days. Do not exceed 2.8 lb ai/A per season. Do not feed forage to livestock within 7 days. Do not cut treated fresh pea forage for hay within 10 days.
- thiamethoxam (Cruiser Maxx) at 1.5 fl oz /100 lb seed (about 25g ai/100 g seed)
These products contain commonly used active ingredients for control of pea leaf weevil in dry edible and seed pea. There are other materials available. Please consult a licensed crop advisor for additional recommendations.